🎨 Blurolls 12-Color MMU3 Feeder Upgrade Kit

For Prusa i3 MK3S+ / MK4 / MK4S / Core One Multi-Material Printing

Important: This is an upgrade/feeder kit only. It does not include 3D printed parts (you must print these yourself), the printer, or filaments. Designed to work with Prusa's MMU3 multi-material system.Key Features🌈 12-Color Filament Capacity

Increases filament count from the standard 5-color MMU to 12 colors, enabling significantly more complex multi-material and multi-color prints.

⚙️ Redesigned Pulley & Idler Layout

Pulley and idler motor positions reversed to maximize use of the 110mm pulley shaft for smoother, more reliable filament feeding.

🎯 Improved FINDA Sensor Placement

FINDA moved to the rear of the selector with a quick-release insert, minimizing filament retraction issues and allowing easy cleaning without recalibration.

🔧 Streamlined MMU3 Design

Updated idler alignment gauge, smaller PTFE-collet inlet, relocated control board beneath the body, and additional bracket mounting options for cleaner Assembly / MMU Feeder Upgrade KitModel NumberMMU3Compatible PrintersPrusa i3 MK3S+, Prusa MK4, Prusa MK4S, Prusa Core OneFilament Capacity12 ColorsOriginMainland ChinaIncludedFeeder hardware, motors, sensors, mounting brackets, cablesNot IncludedPrinted parts, printer, filaments, cutterProduct ImagesFrequently Asked QuestionsDoes this include the 3D printed parts?

No. This kit includes the hardware components only; you will need to print the compatible body parts yourself.

Is the printer or filament included?

No, this is an upgrade kit for the feeder/MMU mechanism only. The printer and filaments are sold separately.

Which printers is this compatible with?

This kit is designed for use with Prusa i3 MK3S+, MK4, MK4S, and Core One printers running the MMU3 multi-material system.

Does the selector include a cutter?

No, the selector does not include the filament cutter.